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    <title>Document</title>
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<body>
    <script>
        function Star(uname,age){
            this.uname = uname;
            this.age = age;
        }
        Star.prototype.sing = function(){
            console.log('我会唱歌');
        }
        var ldh = new Star('刘德华',18);
        console.log(Star.prototype);
        console.log(Star.prototype.__proto__ === Object.prototype);
        console.log(Object.prototype.__proto__);
    </script>
</body>
</html>